Creating custom donut or pie chart using c3.js

Question

Trying to create the below using c3.js.

We are using the same charting library across the application so would like to keep it consistent. Didn't find a way in c3.js to either customize donut or pie chart to get this. Any help or pointers are greatly appreciated.

Answer 1

HTML

<div id="chart"></div>

CSS

#chart {
    width: 150px;
    height: 150px;    
}

/* don't do anything fancy when hovering */
#chart .c3-defocused.c3-target {
    opacity: 1 !important;
}

#chart text {
    fill: #ccc;
}

#chart .c3-chart-arcs-title {
    fill: white;
    font-size: 3em;
}

JS

var percentage = 0.79;

var chart = c3.generate({
    data: {
        columns: [
            ['show', percentage],
            ['dontshow', 1 - percentage],
        ],
        type: 'donut',
        order: null
    },
    color: {
        pattern: ['#13BDD1', '#FFF']
    },
    legend: {
        show: false
    },
    donut: {
        label: {
            show: false
        },
        title: Math.round(percentage * 100),
        width: 15,
        expand: false
    },
    tooltip: {
        show: false
    }
});

// baseline text properly
d3
    .select(".c3-chart-arcs-title")
    .attr("dy", "0.3em")

// add percentage symbol
d3.select(".c3-chart-arcs")
    .append("text")
    .text("%")
    .attr("dy", "-0.5em")
    .attr("dx", "2em")

// black background for center text
d3.select(".c3-chart")
    .insert("circle", ":first-child")
    .attr("cx", chart.internal.width / 2)
    .attr("cy", chart.internal.height / 2 - chart.internal.margin.top)
    .attr("r", chart.internal.innerRadius)

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Fiddle - http://jsfiddle.net/xpvhow5p/

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